To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie 7 Response of swimming larvae to dimming light. Two larvae showing swim-trajectory reversals at light dimming are circled. Photoreceptor specialization and the visuomotor repertoire of the primitive chordate Ciona Priscilla Salas, Vall Vinaithirthan, Erin Newman-Smith, Matthew J. Kourakis, and William C. Smith Journal of Experimental Biology 2018. 221:None-None; doi: 10.1242/jeb.177972 Download Original Video